笔试面试

一道Codility平台基础算法题讲解. 原题如下: Two non-negative integers are called siblings if they can be obtained from each other by rearranging the digits of their decimal representations. For example, 123 and 213 are siblings. 535 and 355 are also siblings. A set consisting of a non-negative integer N and all of its siblings is called the family of